Though he was bound at elbows and wrists, the young lieutenant's fingers were free. Wriggling slightly nearer, Hal fingered at the cords that bound Simm's wrists. That soldier felt and understood. Wriggling slightly nearer, and doing it so easily and gradually as not to attract the attention of the Mexican guard, Simms waited to see what would come of his officer's new move.

Slowly, diligently, Hal worked at the first knot. He felt a thrill of joy when his busy fingers untangled that knot. Then another one, and another one. Simms's wrists were free! The soldier, without attracting attention so far, moved himself slightly so as to bring his bound elbows within easy reach of Lieutenant Hal's fingers.

But there was no telling at what moment these fanatic Mexicans would discover what was going on, and balk it all.

Simms's wrists were free. Slowly, the soldier tried to repay his officer. Then Hal's wrists were free; then his elbows.

Two of the prisoners were now free, though they were careful not to move their arms in the least.

Yet how much had been gained? Two men there were who might leap up and fight for their lives. But they were unarmed, while the alert Mexicans had revolvers in their hands and dirks within instant reach.

Had either Hal or his man been able to roll over completely, one more comrade's knots would then be within reach. Yet, in rolling, either lieutenant or private would surely betray to the guards the fact that the cords were loosed from his arms. Nor could there be much doubt as to what the two desperate Mexicans would do in the face of any attempt at escape.

Hal lay there deliberating, trying to plan some move that would carry with it a reasonable prospect of victory. Simms, fearing to spoil any of his officer's plans, kept wholly silent, though alert for any signal.

"It's only the slimmest kind of a fighting chance yet!" muttered Hal. He would have been despondent, but his soldier's training had taught him that no situation is hopeless as long as life lasts.

Then craft, slowly, but insinuatingly, entered the young lieutenant's head.